Segmented Pressing Mechanism for Finger Positioning in Nail Design
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Solution Overview
Problem
Conventional nail design drawing apparatuses face challenges in securely holding fingers of varying sizes and shapes, leading to positional deviations and discomfort during the drawing process, as they often rely on a single finger holding mechanism that cannot accommodate different finger thicknesses and shapes effectively.
Innovation Solution
A holding apparatus with a pressing mechanism that includes multiple pressing members along the finger insertion direction, where each member can move to secure the finger, with a biasing force configuration that ensures the nail is held at a consistent height, accommodating different finger thicknesses by using a higher biasing force for the first pressing member positioned at the back and lower forces for the others.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single finger holding part is used to secure all fingers, then the apparatus structure is simple, but thick fingers are squeezed too tightly causing pain while thin fingers are not sufficiently secured leading to positional deviation
Solution Approach 1:
The holding mechanism is divided into multiple pressing members (first pressing member, second pressing member, third pressing member) arranged along the insertion direction. Each pressing member independently presses different regions of the finger (tip area, middle area, base area), allowing differential pressure application that adapts to various finger thicknesses and shapes, resolving the contradiction between versatility and structural simplicity.
2Manufacturing precision
If the height of the tip area is aligned with a predetermined height position, then the nail top surface can be horizontal, but the entire nail slants downward when the base side height is low
Solution Approach 1:
The pressing members apply pressure at different locations along the finger insertion direction with different biasing forces. The first pressing member (at the back) has greater biasing force to lift the base area, while the second and third pressing members have smaller biasing forces. This localized differential pressure compensates for finger thickness variations, maintaining both the horizontal nail top surface and proper nail orientation simultaneously.
3Reliability
If a single pressing force is applied to all fingers, then the holding mechanism is simple, but positional deviation occurs during drawing for thin fingers
Solution Approach 1:
The pressing members are designed with springs as biasing members, making the pressing force dynamic rather than fixed. The spring constants are configured such that the first pressing member has greater biasing force and the second and third pressing members have smaller biasing forces. This dynamic pressure distribution automatically adapts to different finger thicknesses, ensuring reliable position stability without excessive complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for secure and comfortable holding of fingers of various sizes and shapes, ensuring accurate nail design application without positional deviation, as the pressing mechanism adjusts to maintain the nail at a suitable height for drawing, enhancing the quality of the nail printing process.
Implementation Method 1
each of the plurality of pressing members is capable of movement in a first direction pressing the object to a side of the holding wall and a second direction opposite the first direction, and is biased toward the first direction
Data Source
AI summary
A holding apparatus includes an insertion space into which an object, namely a finger or a toe including a nail, is inserted; and a plurality of pressing members disposed in the insertion space along an insertion direction of the object into the insertion space, that hold the object inserted into the insertion space in the insertion space. In such a holding apparatus, the insertion space includes an object holding wall provided at a position capable of contacting the object inserted into the insertion space; each of the plurality of pressing members is capable of movement in a first direction pressing the object to a side of the holding wall and a second direction opposite the first direction, and is biased toward the first direction; and a biasing force biasing the a first pressing member of the plurality of pressing members disposed relatively at a back side in the insertion direction is greater than biasing forces biasing the other pressing members.